EQUITY (Changes in Equity) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Equity [Line Items]
Common Stock, Value, Issued, Balance at January 1,				$ 221					$ 221
Common Stock, Value, Issued, Balance at December 31,	221				221				221	221
Capital in Excess of Par Value of Stock, Balance at January 1,				1,922				2,694	1,922	2,694	3,114
Employee stock compensation plans, Capital in Excess of Par Value of Stock									(393)	(772)	(420)
Debt conversion, Capital in Excess of Par Value of Stock									(22)
Capital in Excess of Par Value of Stock, Balance at December 31,	1,507				1,922				1,507	1,922	2,694
Retained Earnings, Balance at January 1,				32,952				32,733	32,952	32,733	33,069
Net Earnings/(Loss) Attributable to BMS	13	721	333	937	726	692	536	609	2,004	2,563	1,960
Cash dividends declared									(2,415)	(2,344)	(2,296)
Retained Earnings, Balance at December 31,	32,541				32,952				32,541	32,952	32,733
Treasury Stock, Shares, Balance at January 1,				559					559
Treasury Stock, Shares, Balance at December 31,	547				559				547	559
Cost of Treasury Stock, Balance at January 1,				(17,800)					(17,800)
Cost of Treasury Stock, Balance at December 31,	(16,992)				(17,800)				(16,992)	(17,800)
Noncontrolling interest, Balance at January 1,				82				15	82	15	(89)
Net earnings attributable to noncontrolling interest									39	38	850
Other comprehensive income attributable to noncontrolling interest											(6)
Variable interest entity									59
Distributions									(49)	29	(740)
Noncontrolling interest, Balance at December 31,	131				82				131	82	15
Net earnings attributable to noncontrolling interest, tax									22	20	317
Common Stock [Member]
Equity [Line Items]
Common Stock, Shares Issued, Balance at January 1,											2,205
Common Stock, Shares Issued, Balance at December 31,	2,208				2,208				2,208	2,208	2,208
Common Stock, Value, Issued, Balance at January 1,											220
Common Stock, Value, Issued, Balance at December 31,	221				221				221	221	221
Employee stock compensation plans, Shares											3
Employee stock compensation plans, Cost											1
Treasury Stock [Member]
Equity [Line Items]
Treasury Stock, Shares, Balance at January 1,				559				570	559	570	515
Stock repurchase program, Treasury Stock										11	73
Employee stock compensation plans, Shares									(11)	(22)	(18)
Debt conversion, Shares									(1)
Treasury Stock, Shares, Balance at December 31,	547				559				547	559	570
Cost of Treasury Stock, Balance at January 1,				(17,800)				(18,823)	(17,800)	(18,823)	(17,402)
Stock repurchase program, Cost of Treasury Stock										(413)	(2,407)
Employee stock compensation plans, Cost									755	1,436	986
Debt conversion, Cost									53
Cost of Treasury Stock, Balance at December 31,	$ (16,992)				$ (17,800)				$ (16,992)	$ (17,800)	$ (18,823)